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          转载：常用的正则表达式
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<figure class="highlight cs"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br></pre></td><td class="code"><pre><span class="line">一、校验数字的表达式</span><br><span class="line"> <span class="number">1</span> 数字：^[<span class="number">0</span><span class="number">-9</span>]*$</span><br><span class="line"> <span class="number">2</span> n位的数字：^\d&#123;n&#125;$</span><br><span class="line"> <span class="number">3</span> 至少n位的数字：^\d&#123;n,&#125;$</span><br><span class="line"> <span class="number">4</span> m-n位的数字：^\d&#123;m,n&#125;$</span><br><span class="line"> <span class="number">5</span> 零和非零开头的数字：^(<span class="number">0</span>|[<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]*)$</span><br><span class="line"> <span class="number">6</span> 非零开头的最多带两位小数的数字：^([<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]*)+(.[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">1</span>,<span class="number">2</span>&#125;)?$</span><br><span class="line"> <span class="number">7</span> 带<span class="number">1</span><span class="number">-2</span>位小数的正数或负数：^(\-)?\d+(\.\d&#123;<span class="number">1</span>,<span class="number">2</span>&#125;)?$</span><br><span class="line"> <span class="number">8</span> 正数、负数、和小数：^(\-|\+)?\d+(\.\d+)?$</span><br><span class="line"> <span class="number">9</span> 有两位小数的正实数：^[<span class="number">0</span><span class="number">-9</span>]+(.[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">2</span>&#125;)?$</span><br><span class="line"><span class="number">10</span> 有<span class="number">1</span>~<span class="number">3</span>位小数的正实数：^[<span class="number">0</span><span class="number">-9</span>]+(.[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">1</span>,<span class="number">3</span>&#125;)?$</span><br><span class="line"><span class="number">11</span> 非零的正整数：^[<span class="number">1</span><span class="number">-9</span>]\d*$ 或 ^([<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]*)&#123;<span class="number">1</span>,<span class="number">3</span>&#125;$ 或 ^\+?[<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]*$</span><br><span class="line"><span class="number">12</span> 非零的负整数：^\-[<span class="number">1</span><span class="number">-9</span>][]<span class="number">0</span><span class="number">-9</span><span class="string">"*$ 或 ^-[1-9]\d*$</span></span><br><span class="line"><span class="string">13 非负整数：^\d+$ 或 ^[1-9]\d*|0$</span></span><br><span class="line"><span class="string">14 非正整数：^-[1-9]\d*|0$ 或 ^((-\d+)|(0+))$</span></span><br><span class="line"><span class="string">15 非负浮点数：^\d+(\.\d+)?$ 或 ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$</span></span><br><span class="line"><span class="string">16 非正浮点数：^((-\d+(\.\d+)?)|(0+(\.0+)?))$ 或 ^(-([1-9]\d*\.\d*|0\.\d*[1-9]\d*))|0?\.0+|0$</span></span><br><span class="line"><span class="string">17 正浮点数：^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$ 或 ^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$</span></span><br><span class="line"><span class="string">18 负浮点数：^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$ 或 ^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$</span></span><br><span class="line"><span class="string">19 浮点数：^(-?\d+)(\.\d+)?$ 或 ^-?([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0)$</span></span><br><span class="line"><span class="string">二、校验字符的表达式</span></span><br><span class="line"><span class="string"> 1 汉字：^[\u4e00-\u9fa5]&#123;0,&#125;$</span></span><br><span class="line"><span class="string"> 2 英文和数字：^[A-Za-z0-9]+$ 或 ^[A-Za-z0-9]&#123;4,40&#125;$</span></span><br><span class="line"><span class="string"> 3 长度为3-20的所有字符：^.&#123;3,20&#125;$</span></span><br><span class="line"><span class="string"> 4 由26个英文字母组成的字符串：^[A-Za-z]+$</span></span><br><span class="line"><span class="string"> 5 由26个大写英文字母组成的字符串：^[A-Z]+$</span></span><br><span class="line"><span class="string"> 6 由26个小写英文字母组成的字符串：^[a-z]+$</span></span><br><span class="line"><span class="string"> 7 由数字和26个英文字母组成的字符串：^[A-Za-z0-9]+$</span></span><br><span class="line"><span class="string"> 8 由数字、26个英文字母或者下划线组成的字符串：^\w+$ 或 ^\w&#123;3,20&#125;$</span></span><br><span class="line"><span class="string"> 9 中文、英文、数字包括下划线：^[\u4E00-\u9FA5A-Za-z0-9_]+$</span></span><br><span class="line"><span class="string">10 中文、英文、数字但不包括下划线等符号：^[\u4E00-\u9FA5A-Za-z0-9]+$ 或 ^[\u4E00-\u9FA5A-Za-z0-9]&#123;2,20&#125;$</span></span><br><span class="line"><span class="string">11 可以输入含有^%&amp;',;=?$\"等字符：[^%&amp;',;=?$\x22]+</span></span><br><span class="line"><span class="string">12 禁止输入含有~的字符：[^~\x22]+</span></span><br><span class="line"><span class="string">三、特殊需求表达式</span></span><br><span class="line"><span class="string"> 1 Email地址：^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$</span></span><br><span class="line"><span class="string"> 2 域名：[a-zA-Z0-9][-a-zA-Z0-9]&#123;0,62&#125;(/.[a-zA-Z0-9][-a-zA-Z0-9]&#123;0,62&#125;)+/.?</span></span><br><span class="line"><span class="string"> 3 InternetURL：[a-zA-z]+://[^\s]* 或 ^http://([\w-]+\.)+[\w-]+(/[\w-./?%&amp;=]*)?$</span></span><br><span class="line"><span class="string"> 4 手机号码：^(13[0-9]|14[5|7]|15[0|1|2|3|5|6|7|8|9]|18[0|1|2|3|5|6|7|8|9])\d&#123;8&#125;$</span></span><br><span class="line"><span class="string"> 5 电话号码("</span>XXX-XXXXXXX<span class="string">"、"</span>XXXX-XXXXXXXX<span class="string">"、"</span>XXX-XXXXXXX<span class="string">"、"</span>XXX-XXXXXXXX<span class="string">"、"</span>XXXXXXX<span class="string">"和"</span>XXXXXXXX)：^(\(\d&#123;<span class="number">3</span>,<span class="number">4</span>&#125;-)|\d&#123;<span class="number">3.4</span>&#125;-)?\d&#123;<span class="number">7</span>,<span class="number">8</span>&#125;$ </span><br><span class="line"> <span class="number">6</span> 国内电话号码(<span class="number">0511</span><span class="number">-4405222</span>、<span class="number">021</span><span class="number">-87888822</span>)：\d&#123;<span class="number">3</span>&#125;-\d&#123;<span class="number">8</span>&#125;|\d&#123;<span class="number">4</span>&#125;-\d&#123;<span class="number">7</span>&#125;</span><br><span class="line"> <span class="number">7</span> 身份证号(<span class="number">15</span>位、<span class="number">18</span>位数字)：^\d&#123;<span class="number">15</span>&#125;|\d&#123;<span class="number">18</span>&#125;$</span><br><span class="line"> <span class="number">8</span> 短身份证号码(数字、字母x结尾)：^([<span class="number">0</span><span class="number">-9</span>])&#123;<span class="number">7</span>,<span class="number">18</span>&#125;(x|X)?$ 或 ^\d&#123;<span class="number">8</span>,<span class="number">18</span>&#125;|[<span class="number">0</span><span class="number">-9</span>x]&#123;<span class="number">8</span>,<span class="number">18</span>&#125;|[<span class="number">0</span><span class="number">-9</span>X]&#123;<span class="number">8</span>,<span class="number">18</span>&#125;?$</span><br><span class="line"> <span class="number">9</span> 帐号是否合法(字母开头，允许<span class="number">5</span><span class="number">-16</span>字节，允许字母数字下划线)：^[a-zA-Z][a-zA-Z0<span class="number">-9</span>_]&#123;<span class="number">4</span>,<span class="number">15</span>&#125;$</span><br><span class="line"><span class="number">10</span> 密码(以字母开头，长度在<span class="number">6</span>~<span class="number">18</span>之间，只能包含字母、数字和下划线)：^[a-zA-Z]\w&#123;<span class="number">5</span>,<span class="number">17</span>&#125;$</span><br><span class="line"><span class="number">11</span> 强密码(必须包含大小写字母和数字的组合，不能使用特殊字符，长度在<span class="number">8</span><span class="number">-10</span>之间)：^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).&#123;<span class="number">8</span>,<span class="number">10</span>&#125;$  </span><br><span class="line"><span class="number">12</span> 日期格式：^\d&#123;<span class="number">4</span>&#125;-\d&#123;<span class="number">1</span>,<span class="number">2</span>&#125;-\d&#123;<span class="number">1</span>,<span class="number">2</span>&#125;</span><br><span class="line"><span class="number">13</span> 一年的<span class="number">12</span>个月(<span class="number">01</span>～<span class="number">09</span>和<span class="number">1</span>～<span class="number">12</span>)：^(<span class="number">0</span>?[<span class="number">1</span><span class="number">-9</span>]|<span class="number">1</span>[<span class="number">0</span><span class="number">-2</span>])$</span><br><span class="line"><span class="number">14</span> 一个月的<span class="number">31</span>天(<span class="number">01</span>～<span class="number">09</span>和<span class="number">1</span>～<span class="number">31</span>)：^((<span class="number">0</span>?[<span class="number">1</span><span class="number">-9</span>])|((<span class="number">1</span>|<span class="number">2</span>)[<span class="number">0</span><span class="number">-9</span>])|<span class="number">30</span>|<span class="number">31</span>)$ </span><br><span class="line"><span class="number">15</span> 钱的输入格式：</span><br><span class="line"><span class="number">16</span>    <span class="number">1.</span>有四种钱的表示形式我们可以接受:<span class="string">"10000.00"</span> 和 <span class="string">"10,000.00"</span>, 和没有 <span class="string">"分"</span> 的 <span class="string">"10000"</span> 和 <span class="string">"10,000"</span>：^[<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]*$ </span><br><span class="line"><span class="number">17</span>    <span class="number">2.</span>这表示任意一个不以<span class="number">0</span>开头的数字,但是,这也意味着一个字符<span class="string">"0"</span>不通过,所以我们采用下面的形式：^(<span class="number">0</span>|[<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]*)$ </span><br><span class="line"><span class="number">18</span>    <span class="number">3.</span>一个<span class="number">0</span>或者一个不以<span class="number">0</span>开头的数字.我们还可以允许开头有一个负号：^(<span class="number">0</span>|-?[<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]*)$ </span><br><span class="line"><span class="number">19</span>    <span class="number">4.</span>这表示一个<span class="number">0</span>或者一个可能为负的开头不为<span class="number">0</span>的数字.让用户以<span class="number">0</span>开头好了.把负号的也去掉,因为钱总不能是负的吧.下面我们要加的是说明可能的小数部分：^[<span class="number">0</span><span class="number">-9</span>]+(.[<span class="number">0</span><span class="number">-9</span>]+)?$ </span><br><span class="line"><span class="number">20</span>    <span class="number">5.</span>必须说明的是,小数点后面至少应该有<span class="number">1</span>位数,所以<span class="string">"10."</span>是不通过的,但是 <span class="string">"10"</span> 和 <span class="string">"10.2"</span> 是通过的：^[<span class="number">0</span><span class="number">-9</span>]+(.[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">2</span>&#125;)?$ </span><br><span class="line"><span class="number">21</span>    <span class="number">6.</span>这样我们规定小数点后面必须有两位,如果你认为太苛刻了,可以这样：^[<span class="number">0</span><span class="number">-9</span>]+(.[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">1</span>,<span class="number">2</span>&#125;)?$ </span><br><span class="line"><span class="number">22</span>    <span class="number">7.</span>这样就允许用户只写一位小数.下面我们该考虑数字中的逗号了,我们可以这样：^[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">1</span>,<span class="number">3</span>&#125;(,[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">3</span>&#125;)*(.[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">1</span>,<span class="number">2</span>&#125;)?$ </span><br><span class="line"><span class="number">23</span>    <span class="number">8.1</span>到<span class="number">3</span>个数字,后面跟着任意个 逗号+<span class="number">3</span>个数字,逗号成为可选,而不是必须：^([<span class="number">0</span><span class="number">-9</span>]+|[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">1</span>,<span class="number">3</span>&#125;(,[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">3</span>&#125;)*)(.[<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">1</span>,<span class="number">2</span>&#125;)?$ </span><br><span class="line"><span class="number">24</span>    备注：这就是最终结果了,别忘了<span class="string">"+"</span>可以用<span class="string">"*"</span>替代如果你觉得空字符串也可以接受的话(奇怪,为什么?)最后,别忘了在用函数时去掉去掉那个反斜杠,一般的错误都在这里</span><br><span class="line"><span class="number">25</span> xml文件：^([a-zA-Z]+-?)+[a-zA-Z0<span class="number">-9</span>]+\\.[x|X][m|M][l|L]$</span><br><span class="line"><span class="number">26</span> 中文字符的正则表达式：[\u4e00-\u9fa5]</span><br><span class="line"><span class="number">27</span> 双字节字符：[^\x00-\xff]    (包括汉字在内，可以用来计算字符串的长度(一个双字节字符长度计<span class="number">2</span>，ASCII字符计<span class="number">1</span>))</span><br><span class="line"><span class="number">28</span> 空白行的正则表达式：\n\s*\r    (可以用来删除空白行)</span><br><span class="line"><span class="number">29</span> HTML标记的正则表达式：&lt;(\S*?)[^&gt;]*&gt;.*?&lt;/\<span class="number">1</span>&gt;|&lt;.*? /&gt;    (网上流传的版本太糟糕，上面这个也仅仅能部分，对于复杂的嵌套标记依旧无能为力)</span><br><span class="line"><span class="number">30</span> 首尾空白字符的正则表达式：^\s*|\s*$或(^\s*)|(\s*$)    (可以用来删除行首行尾的空白字符(包括空格、制表符、换页符等等)，非常有用的表达式)</span><br><span class="line"><span class="number">31</span> 腾讯QQ号：[<span class="number">1</span><span class="number">-9</span>][<span class="number">0</span><span class="number">-9</span>]&#123;<span class="number">4</span>,&#125;    (腾讯QQ号从<span class="number">10000</span>开始)</span><br><span class="line"><span class="number">32</span> 中国邮政编码：[<span class="number">1</span><span class="number">-9</span>]\d&#123;<span class="number">5</span>&#125;(?!\d)    (中国邮政编码为<span class="number">6</span>位数字)</span><br><span class="line"><span class="number">33</span> IP地址：\d+\.\d+\.\d+\.\d+    (提取IP地址时有用)</span><br></pre></td></tr></table></figure>
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    <strong>Post author:  </strong>Coding Spirit
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